leather

Abstract

To provide a leather having a high grade feeling, which has excellent surface conductivity for suppressing static electricity from occurring and allows deep hue to be expressed.SOLUTION: A leather is formed by sequentially laminating an anti-static layer and an antireflection layer on a surface of a natural leather or a synthetic leather. The anti-static layer preferably consists of resin and conductive particles having 1.6 to 2.1 of refraction index. Thickness of the anti-static layer is preferably 50 nm-1 μm. The antireflection layer preferably consists of resin and low refractive index particles having 1.2 to 1.45 of refraction index. Thickness of the antireflection layer is preferably 50 nm to 1 μm.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to leather that suppresses the generation of static electricity and has a deep color. [Background technology]

[0002] Leather is used as a luxurious material for applications such as vehicle interiors, building interiors, furniture, bags, shoes, etc. Synthetic leathers that offer a luxurious feel comparable to natural leather have also been developed, and their applications are expanding.

[0003] In particular, leather that is less susceptible to static electricity is desired for use as a sheet material that comes into frequent contact with the human body, and many proposals have been made so far regarding antistatic treatment for leather. For example, Patent Document 1 discloses a leather having a conductive surface layer and a conductive fiber substrate, and the surface resistance of the surface layer is 1.0 × 10 6 Ω or more 1.0×10 12 Ω or less, the surface resistance of the fiber substrate is lower than the surface resistance of the skin layer, and the resistance between the fiber and ground is 1.0 x 10 6 Ω or more 1.0×10 11 The paper discloses a conductive synthetic leather with a resistance of Ω or less. Examples of conductive agents for imparting conductivity to the surface layer include carbon-based conductive materials such as carbon black, metal-based conductive materials such as zinc oxide, indium tin oxide (ITO), and antimony tin oxide, and surfactants. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-50998 Summary of the Invention [Problem to be solved by the invention]

[0005] The conductive synthetic leather described in Patent Document 1 can produce synthetic leather with excellent antistatic properties, but the surface of the leather containing particulate conductive agents in the skin layer is pale and unable to express the deep, wet-looking color. Another drawback is that the unevenness of the leather surface becomes less noticeable. As a result, there are issues with the appearance being unattractive and the surface feeling cheap. [Means for solving the problem]

[0006] The leather of the present invention comprises an antistatic layer and an antireflection layer laminated in this order on the surface of natural leather or synthetic leather, The antistatic layer is made of a resin and conductive particles, and the antireflection layer is made of a resin and low-refractive-index particles having a refractive index of 1.2 to 1.45. This is a leather characterized by the following.

[0007] The antistatic layer preferably comprises a resin and conductive particles having a refractive index of 1.6 to 2.1 The thickness of the antistatic layer preferably ranges from 50 nm to 1 μm. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide leather that has excellent surface conductivity, a deep color, clear grain, and a luxurious feel. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing the cross-sectional structure of the leather (based on natural leather) of the present invention. [Figure 2] 1 is a schematic diagram showing the cross-sectional structure of the leather (synthetic leather base) of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] The leather of the present invention uses natural leather or synthetic leather as a base. The natural leather used in the present invention is not fur, but leather that has been dehaired and tanned as necessary. There are no limitations on the type of rawhide or tanning method. For example, rawhide from mammals such as cattle, pigs, horses, goats, sheep, and deer, birds such as ostriches, and reptiles such as sea turtles, monitor lizards, pythons, and crocodiles can be used. Tanning methods include typical chrome tanning and tannin tanning, as well as methods using mineral tanning agents such as aluminum tanning, zirconium tanning, titanium tanning, and ferric salt tanning, methods using organic tanning agents such as aldehyde tanning, tanning using synthetic tanning agents such as naphthalene-based synthetic tanning agents, phenol-based synthetic tanning agents, and resin tanning agents, and oil tanning, as typified by chamois leather.

[0012] The natural leather used in the present invention undergoes preparatory steps of soaking, lining, unhairing and liming, splitting, descaling, reliming, deliming and bating, followed by a tanning step to impart flexibility and heat resistance to the leather. Further treatments such as dyeing and greasing may be performed. Furthermore, a resin skin layer made of acrylic resin, urethane resin, epoxy resin, etc. may be laminated on the surface of the natural leather.

[0013] On the other hand, the synthetic leather of the present invention may be composed of a fabric substrate made of fibers and a resin skin layer formed on the surface thereof. The fabric substrate may be a woven fabric, a knitted fabric, a nonwoven fabric, or the like. Examples of fibrous materials constituting the fabric substrate include natural fibers such as cotton, linen, and wool; synthetic fibers such as polyamide, polyester, and polyacrylonitrile; semi-synthetic fibers such as acetate; and regenerated fibers such as rayon. The fabric substrate may be subjected to treatments such as scouring and dyeing under general conditions.

[0014] The main component of the resin skin layer is a synthetic resin, such as an acrylic resin, a urethane resin, or an epoxy resin. Among these, a urethane resin is preferred for its durability and texture. The resin skin layer may also contain other components such as pigments, dyes, and additives such as silicone.

[0015] The thickness of the resin skin layer is not particularly limited, but is preferably 20 to 50 μm. If the thickness of the resin skin layer is in the range of 20 to 50 μm, a uniform resin film can be formed without impairing flexibility.

[0016] Examples of a method for laminating the resin skin layer on one surface of the fabric substrate include a method in which the resin skin layer formed on the surface of release paper or the like is attached via an adhesive layer.Other examples include a method in which a resin composition that becomes the resin skin layer upon drying and solidification is applied to one surface of the fabric substrate, followed by drying and solidification.

[0017] Examples of materials that can be used to form the adhesive layer include acrylic resin, urethane resin, epoxy resin, etc. Among these, urethane resin is preferred because it provides durability and a luxurious feel.

[0018] The urethane resin component constituting the resin skin layer is generally called a polyurethane resin or polyurethane urea resin, and examples thereof include those obtained by reacting polyalkylene ether glycol, hydroxyl-terminated polyester polyol, poly-ε-caprolactone polyol, polycarbonate polyol, or the like, each having a molecular weight of 400 to 4,000, alone or in combination, with an organic diisocyanate. These can also be chain-extended, if necessary, with a compound having two active hydrogens (a chain extender).

[0019] Examples of the polyalkylene ether glycol include polytetramethylene ether glycol, polypropylene glycol, polyethylene glycol, glycerin propylene oxide adduct, polyether polyol having ethylene oxide added to the terminal, and vinyl monomer grafted polyether polyol.

[0020] Examples of the polyester polyol include those obtained by reacting alkylene glycols such as ethylene glycol, butylene glycol, hexylene glycol, diethylene glycol, dipropylene glycol, and neopentyl glycol with carboxylic acids such as succinic acid, glutaric acid, adipic acid, sebacic acid, maleic acid, fumaric acid, phthalic acid, and trimellitic acid so that the terminals are hydroxyl acids.

[0021] Examples of the polycarbonate polyol include polyethylene carbonate diol, polytetramethylene carbonate diol, and polyhexamethylene carbonate diol.

[0022] Examples of the organic diisocyanate include aromatic isocyanates such as 2,4- or 2,6-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, and xylylene diisocyanate; and aliphatic isocyanates such as 1,6-hexamethylene diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, 3-isocyanatomethyl-3,5,5'-trimethylcyclohexyl isocyanate, and 2,6-diisocyanatomethyl caproate. These may be used alone or in combination of two or more.

[0023] As the chain extender, hydrazine, ethylenediamine, tetramethylenediamine, water, piperazine, isophoronediamine, ethylene glycol, butylene glycol, hexylene glycol, diethylene glycol, dipropylene glycol, neopentyl glycol, etc., or glycols and diamines capable of improving hydrophilicity, such as dimethylolpropionic acid and ethylene oxide adducts of aminoethanesulfonic acid, can be used alone or in combination.

[0024] The acrylic resin is a resin composed of a polyfunctional acrylic monomer, a polyfunctional acrylic oligomer, or both.

[0025] Examples of polyfunctional acrylic monomers include polyol polyacrylates such as ethylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, and dipentaerythritol hexa(meth)acrylate; epoxy acrylates such as di(meth)acrylate of bisphenol A diglycidyl ether and di(meth)acrylate of hexanediol diglycidyl ether; and urethane acrylates obtained by reacting polyisocyanate with a hydroxyl group-containing acrylate such as hydroxyethyl (meth)acrylate.

[0026] The polyfunctional acrylic oligomer used in the acrylic component is a general oligomer such as polyester acrylate, epoxy acrylate, urethane acrylate, or polyol acrylate, and among these oligomers, the main skeleton is a linear one (zero branch points) or the main skeleton has one branch point.

[0027] In the leather of the present invention, an antistatic layer is laminated on the surface of the natural leather or synthetic leather. The antistatic layer is made of resin and conductive particles. The conductive particles preferably have a refractive index of 1.6 to 2.1. When the refractive index of the conductive particles is within this range, the effect of making the grain of the leather more distinct can be obtained. Examples of such conductive particles include ITO (indium tin oxide), ATO (antimony-doped tin oxide), FTO (fluorine-doped tin oxide), GZO (gallium-doped zinc oxide), AZO (aluminum-doped zinc oxide), carbon, carbon nanofibers, etc.

[0028] The primary particle diameter of the conductive particles is preferably 10 nm to 100 nm. If the primary particle diameter is within this range, the effects of imparting antistatic properties and making the grain of the leather more distinct can be obtained.

[0029] Examples of resins constituting the antistatic layer include urethane resins, acrylic resins, epoxy resins, etc. Among these, urethane resins and acrylic resins are preferred because they provide durability and a luxurious texture.

[0030] Examples of urethane resins include those obtained by reacting polyester diols, polyether diols, polycarbonate polyols, etc., alone or in combination, with polyisocyanates. These can also be chain-extended with a compound (chain extender) having two active hydrogens, as needed. Examples of acrylic resins include polyester acrylates, epoxy acrylates, urethane acrylates, polyol acrylates, etc.

[0031] The thickness of the antistatic layer is preferably 50 nm to 1 μm. If the thickness of the antistatic layer is within this range, the effects of imparting antistatic properties and making the grain of the leather more pronounced can be obtained.

[0032] The content of the conductive particles contained in the antistatic layer is preferably 30 to 90% by mass in terms of solid content.

[0033] Methods for forming the antistatic layer on the surface of the natural leather or synthetic leather include spraying, slit coating, screen printing, inkjet printing, etc. Among these, inkjet printing is preferred because it allows pattern printing in any shape and thin film coating.

[0034] The leather of the present invention further comprises an antireflection layer laminated on the surface of the antistatic layer. The antireflection layer is composed of a resin and low-refractive-index particles having a refractive index of 1.2 to 1.45. The term "low" in low-refractive-index particles here refers to particles having a refractive index lower than that of the conductive particles. When the refractive index of the low-refractive-index particles is within this range, it is possible to express deep colors. Examples of such low-refractive-index particles include inorganic particles such as SiO2 (refractive index 1.40) and hollow silica (refractive index 1.25), and organic particles such as PTFE (polytetrafluoroethylene, refractive index 1.30).

[0035] The primary particle diameter of the low refractive index particles is preferably 10 nm to 300 nm. If the primary particle diameter is within this range, an effect of obtaining a deep color due to anti-reflection can be obtained.

[0036] Examples of the resin constituting the antireflection layer include acrylic resin, urethane resin, etc. Among these, acrylic resin and urethane resin are preferred because they provide durability and a high-quality texture.

[0037] Examples of urethane resins include those obtained by reacting polyester diols, polyether diols, polycarbonate polyols, etc., alone or in combination, with polyisocyanates. These can also be chain-extended with a compound (chain extender) having two active hydrogens, as needed. Examples of acrylic resins include polyester acrylates, epoxy acrylates, urethane acrylates, polyol acrylates, etc.

[0038] The thickness of the antireflection layer is preferably 50 nm to 1 μm. If the thickness of the antireflection layer is within this range, the effect of dark color due to low reflection can be obtained, and at the same time, the surface resistance of the obtained leather can be reduced to 1.0×10 6 ~1.0×10 11Ω / □. If the thickness of the antireflection layer is less than 50 nm, it is not possible to express a deep color. If the thickness of the antireflection layer exceeds 1 μm, the surface resistance of the resulting leather becomes too high and surface conductivity cannot be obtained. As a result, it becomes difficult to obtain the antistatic effect.

[0039] Methods for forming the antireflection layer on the surface of the antistatic layer include spraying, slit coating, screen printing, and inkjet printing. The antireflection layer may be formed on the entire surface, or may be formed on a portion of the surface as a pattern or design. Furthermore, multiple antireflection layers having different apparent refractive indices may be arranged or formed side by side or stacked. Antireflection layers having different apparent refractive indices can be formed by changing the type and content of low refractive index particles contained. Inkjet printing is suitable as a method for forming an antireflection layer in such a free shape. [Example]

[0040] The present invention will be described in more detail below with reference to examples. However, the present invention is not limited to the following examples, and it is possible to carry out the present invention by making appropriate modifications within the scope of the above and below-described aims, and all such modifications are included in the technical scope of the present invention.

[0041] [Surface resistance value] The surface resistance (Ω / □) of the leathers obtained in the examples and comparative examples was measured using a high resistivity meter Hiresta-UP (manufactured by Nitto Seiko Analytech Co., Ltd.). [Color difference(ΔL * )] The surface of the fibrous composite material, i.e., the surface of the resin skin layer, was measured using an integrating sphere spectrophotometer Color-i5 (manufactured by X-Rite). Next, the surface of the leather obtained in the examples and comparative examples was measured. The leather surface corresponds to the surface of the antireflection layer in the examples and the surface of the antistatic layer in the comparative examples. D 65 The color difference ΔL was calculated by subtracting the brightness of the fibrous composite surface from the brightness of the leather surface. *The color difference ΔL was calculated. * If is a negative value, it can be determined that a deep color effect has been achieved. [Effect of clarifying the grain] The clarity of the grain was evaluated by visual inspection. A grain (uneven design) that replicates the embossed pattern of the release paper is formed on the surface of the fibrous composite material, i.e., the surface of the resin skin layer. The grain on the leather surface obtained in the examples and comparative examples was evaluated visually, with a ◎ indicating that the grain on the leather surface was more clearly visible than the grain on the resin skin layer surface, a ◯ indicating that there was no change in the grain, and an × indicating that the grain was weakly visible.

[0042] [Production Example 1: Polyurethane resin composition a] To 100 parts by mass of a polycarbonate-based polyurethane resin (CRISBON NY-328; manufactured by DIC Corporation), 25 parts by mass of dimethylformamide and 25 parts by mass of methyl ethyl ketone were added, and 15 parts by mass of perylene black pigment (Lumogen Black FK4280; manufactured by BASF) was further added to prepare a polyurethane resin composition a.

[0043] [Production Example 2: Polyurethane resin composition b (adhesive polyurethane resin composition)] A polyurethane resin composition b was prepared by adding 40 parts by mass of dimethylformamide to 100 parts by mass of a polycarbonate-based polyurethane resin (TA-205; manufactured by DIC Corporation).

[0044] Polyurethane resin composition a was applied to release paper (PXD R-86; manufactured by Lintec Corporation) so that the film thickness after drying would be 40 μm, and the coating was dried at 100° C. for 2 minutes in a dryer to form a urethane resin layer A, which would serve as a resin surface layer. The refractive index of this urethane resin layer A was 1.59.

[0045] Next, polyurethane resin composition b (adhesive polyurethane resin composition) was applied onto the urethane resin layer A so that the film thickness after drying would be 80 μm, and the coating was treated in a dryer at 100°C for 1 minute to form a urethane resin layer B (adhesive layer), thereby producing a urethane resin laminated release material having a two-layer urethane resin layer structure.

[0046] Next, the surface of urethane resin layer B of the urethane resin laminated release material was bonded to one side of the polyester tricot knit fabric, which was the base layer, and pressed at 392.3 kPa for 4 seconds, after which the release paper was peeled off, producing a fibrous composite material in which a resin skin layer (urethane resin layer A) was laminated to the base layer via an adhesive layer (urethane resin layer B).

[0047] [Example 1] A polyurethane resin solution for an antistatic layer, prepared according to the following formulation 1, was coated on the surface of the resin skin layer of the above-mentioned fibrous composite material using a bar coater (wet: 4 μm), and then dried at 100°C for 60 minutes to form an antistatic layer with a thickness of 250 nm. Next, a polyurethane resin solution for an antireflective layer, prepared according to the following formulation 2, was coated on the antistatic layer using a bar coater (wet: 6 μm), and then dried at 100°C for 60 minutes to form an antireflective layer with a thickness of 120 nm, thereby obtaining the leather of the present invention.

[0048] Formulation 1 (Polyurethane resin liquid for antistatic layer) Polycarbonate diol (Benebiol NL2030DB, manufactured by Mitsubishi Chemical Corporation, solid content 100% by mass): 1 part by mass Polyisocyanate (Coronate 2770, manufactured by Tosoh Corporation, solid content 100% by mass): 0.23 parts by mass Thermal base generator (U-CAT1102, manufactured by San Nopco Ltd.): 0.01 parts by mass ATO dispersion (EA-D, manufactured by Dai Nippon Toryo Co., Ltd., solid content 40% by mass): 12.4 parts by mass Dipropylene glycol monomethyl ether: 110.4 parts by mass

[0049] Formulation 2 (Polyurethane resin liquid for anti-reflection layer) Polycarbonate diol (Benebiol NL2030DB, manufactured by Mitsubishi Chemical Corporation, solid content 100% by mass): 2 parts by mass Polyisocyanate (Coronate 2770, manufactured by Tosoh Corporation, solid content 100% by mass): 0.5 parts by mass Thermal base generator (U-CAT1102, manufactured by San Nopco Ltd.): 0.01 parts by mass Hollow silica dispersion (Sururia, manufactured by JGC Catalysts and Chemicals Co., Ltd., solid content 25% by mass): 2.5 parts by mass Dipropylene glycol monomethyl ether: 95 parts by mass

[0050] The conductive particles (ATO) contained in the antistatic layer have a refractive index of 2.00, a primary particle diameter of 30 to 40 nm, and the content of ATO particles is approximately 80 mass %. The low refractive index particles contained in the antireflection layer are hollow silica particles with a refractive index of 1.25 and a primary particle diameter of 50 nm. The surface resistance of the obtained leather was 7.3 × 10 8 The color difference was -2.4, and it was confirmed that the grain was clearly defined.

[0051] [Example 2] Leather of the present invention was obtained in the same manner as in Example 1, except that instead of Formulation 1, a polyurethane resin solution for an antistatic layer prepared according to Formulation 3 below was used.

[0052] Formulation 3 (Polyurethane resin liquid for antistatic layer) Polycarbonate diol (Benebiol NL2030DB, manufactured by Mitsubishi Chemical Corporation, solid content 100% by mass): 1 part by mass Polyisocyanate (Coronate 2770, manufactured by Tosoh Corporation, solid content 100% by mass): 0.23 parts by mass Thermal base generator (U-CAT1102, manufactured by San Nopco Ltd.): 0.01 parts by mass AZO dispersion (product name "9407 ZO", manufactured by Tokushiki Co., Ltd., solid content 30% by mass): 16.4 parts by mass Dipropylene glycol monomethyl ether: 106.8 parts by mass

[0053] The conductive particles contained in the antistatic layer are AZO particles with a refractive index of 1.80 and a primary particle diameter of 20 to 40 nm. The content of AZO particles is approximately 80% by mass. The surface resistance of the obtained leather is 5.6 × 10 9The color difference was -2.8, and it was confirmed that the grain was clearly defined.

[0054] [Example 3] Leather of the present invention was obtained in the same manner as in Example 1, except that instead of Formulation 1, a polyurethane resin solution for an antistatic layer prepared according to the following Formulation 4 was used and coated with a bar coater (wet: 8 μm) to form an antistatic layer with a thickness of 720 nm.

[0055] Formulation 4 (Polyurethane resin solution for antistatic layer) Polycarbonate diol (Benebiol NL2030DB, manufactured by Mitsubishi Chemical Corporation, solid content 100% by mass): 4 parts by mass Polyisocyanate (Coronate 2770, manufactured by Tosoh Corporation, solid content 100% by mass): 1 part by mass Thermal base generator (U-CAT1102, manufactured by San Nopco Ltd.): 0.01 parts by mass ATO dispersion (product name EA-D, manufactured by Dai Nippon Toryo Co., Ltd., solid content 40% by mass): 12.4 parts by mass Dipropylene glycol monomethyl ether: 110.4 parts by mass

[0056] The conductive particles contained in the antistatic layer are ATO particles with a refractive index of 2.00 and a primary particle diameter of 30 to 40 nm. The content of ATO particles is approximately 50 mass %. The low refractive index particles contained in the antireflection layer are hollow silica particles with a refractive index of 1.25 and a primary particle diameter of 50 nm. The surface resistance of the obtained leather was 8.3 × 10 10 The color difference was -1.2, and it was confirmed that the grain was clearly defined.

[0057] [Example 4] Leather of the present invention was obtained in the same manner as in Example 1, except that instead of using formulation 2, a polyurethane resin solution for an antireflection layer prepared according to formulation 5 below was coated using a bar coater (wet: 8 μm) to form an antireflection layer with a thickness of 500 nm.

[0058] Formulation 5 (Polyurethane resin liquid for anti-reflection layer) Polycarbonate diol (Benebiol NL2030DB, manufactured by Mitsubishi Chemical Corporation, solid content 100% by mass): 4 parts by mass Polyisocyanate (Coronate 2770, manufactured by Tosoh Corporation, solid content 100% by mass): 1 part by mass Thermal base generator (U-CAT1102, manufactured by San Nopco Ltd.): 0.01 parts by mass Hollow silica dispersion (Sururia, manufactured by JGC Catalysts and Chemicals Co., Ltd., solid content 25% by mass): 5 parts by mass Dipropylene glycol monomethyl ether: 90 parts by mass

[0059] The surface resistance of the obtained leather was 2.4 × 10 10 The color difference was -3.4, and it was confirmed that the grain was clearly defined.

[0060] [Example 5] Leather of the present invention was obtained in the same manner as in Example 1, except that instead of formulation 2, a polyurethane resin solution for an antireflection layer prepared according to formulation 6 below was coated using a bar coater (wet: 4 μm), and then dried at 130°C for 2 minutes to form an antireflection layer with a thickness of 250 nm.

[0061] Formulation 6 (Polyurethane resin liquid for anti-reflection layer) Polycarbonate-based polyurethane resin (RU-40-350, manufactured by Stahl Japan Co., Ltd., solid content 40% by mass): 113 parts by mass Smoothing agent (HM-183, manufactured by Stahl Japan Co., Ltd., solid content 30% by mass): 3 parts by mass Crosslinking agent (XR-78-017, manufactured by Stahl Japan Co., Ltd., solid content 50% by mass): 1 part by mass PTFE water dispersion (D-210C, manufactured by Daikin Industries, Ltd., solid content 60% by mass): 26 parts by mass ·Water: 857 parts by mass

[0062] The low refractive index particles contained in the anti-reflection layer are PTFE particles with a refractive index of 1.30 and a primary particle diameter of 200 nm. The surface resistance of the obtained leather was 4.1 × 10 9The color difference was -1.8, and it was confirmed that the grain was clearly defined.

[0063] [Comparative Example 1] Leather having only an antistatic layer with a thickness of 250 nm laminated thereon was obtained in the same manner as in Example 1, except that no antireflection layer was formed. The surface resistance of the obtained leather was 6.5 × 10 8 The grain was clearly defined, but the color difference was +3.4, meaning the color was not deepened and a deep color could not be expressed.

[0064] [Table 1] [Explanation of symbols]

[0065] 11, 21: Leather 2: Natural leather 3:Resin skin layer 4: Antistatic layer 5: Anti-reflection layer 6:Fabric base material 7: Adhesive layer 8: Synthetic leather

Claims

1. An antistatic layer and an anti-reflective layer are laminated in this order on the surface of natural leather or synthetic leather. The leather is characterized in that the antistatic layer is made of a resin and conductive particles, and the antireflection layer is made of a resin and low refractive index particles having a refractive index of 1.2 to 1.

45.

2. 2. The leather according to claim 1, wherein the antistatic layer is made of a resin and conductive particles having a refractive index of 1.6 to 2.

1.

3. 3. The leather according to claim 1, wherein the antistatic layer has a thickness of 50 nm to 1 μm.

4. The leather according to any one of claims 1 to 3, characterized in that the anti-reflection layer has a thickness of 50 nm to 1 µm.

5. The surface resistance of the antireflection layer is 1.0×10 ６ ~1.0 x 10 11 5. The leather according to claim 1, characterized in that it has a modulus of elasticity of Ω / □.

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